Re: [Xen-devel] save / restore

[Matthieu PATOU <matxen@xxxxxxxxx>]

Hi all
i've done an upgrade to the last changeset of xen-testing rebuild all an install
it but it still failed on the same things ..
Where can i look to solve the problems ? or find some clues  ?
On Wed, 2 Mar 2005 00:26:03 +0100
Matthieu PATOU <matxen@xxxxxxxxx> wrote:

> Hello all,
> i've upgraded a testing version done after  2.0.4  (around the 14 february).
> since then i'm able to save and restore domain with more than one vbd exported
> to (prior test failed when a domain had more than one vbd)
> But it seems to have still some limitations.
> 1) Domains with more than a few vbd failed to save:
> one of my domain have 7vbd:
>     (device (vbd (uname phy:zeus_lvs/athena_root) (dev hdb1) (mode w)))
>     (device (vbd (uname phy:zeus_lvs/athena_var) (dev hdb2) (mode w)))
>     (device (vbd (uname phy:zeus_lvs/athena_usr) (dev hdb3) (mode w)))
>     (device (vbd (uname phy:zeus_lvs/athena_home) (dev hdb4) (mode w)))
>     (device (vbd (uname phy:zeus_lvs/athena_spool_mail) (dev hdb5) (mode w)))
>     (device (vbd (uname phy:zeus_lvs/athena_save) (dev hdb6) (mode w)))
>     (device (vbd (uname phy:zeus_lvs/athena_swap) (dev hdc1) (mode w)))
> and saving failed :
> zeus:/etc/xen# xm save athena /usr/save
> Error: Error: [Failure instance: Traceback: xen.xend.XendError.XendError, save
> failed
> here is the extract of the xfrd log:
> [DEBUG] Conn_sxpr>
> (xfr.save 1 "(domain (id 1) (name athena) (memory 127) (maxmem 131072) (state
> -b---) (cpu 0) (cpu_time 3843.15514214) (up_time 89086.369431) (start_time
> 1109629764.54) (console (status listening) (id 13) (domain 1) (local_port 13)
> (remote_port 1) (console_port 9601)) (devices (vif (idx 0) (vif 0) (mac
> aa:00:00:00:00:20) (bridge xen-br0) (evtchn 15 4) (index 0)) (vbd (idx 0)
> (vdev 833) (device 65028) (mode w) (dev hdb1) (uname phy:zeus_lvs/athena_root)
> (node zeus_lvs/athena_root) (index 0)) (vbd (idx 1) (vdev 834) (device 65029)
> (mode w) (dev hdb2) (uname phy:zeus_lvs/athena_var) (node zeus_lvs/athena_var)
> (index 1)) (vbd (idx 2) (vdev 835) (device 65030) (mode w) (dev hdb3) (uname
> phy:zeus_lvs/athena_usr) (node zeus_lvs/athena_usr) (index 2)) (vbd (idx 3)
> (vdev 836) (device 65031) (mode w) (dev hdb4) (uname phy:zeus_lvs/athena_home)
> (node zeus_lvs/athena_home) (index 3)) (vbd (idx 4) (vdev 837) (device 65032)
> (mode w) (dev hdb5) (uname phy:zeus_lvs/athena_spool_mail) (node
> zeus_lvs/athena_spool_mail) (index 4)) (vbd (idx [DEBUG] Conn_sxpr< err=-12
> 2654 [INF] XFRD> Xfr service err=-12 
> 
> xend.log has thoses informations:
> 
> [2005-03-02 00:14:10 xend] INFO (XendMigrate:370) Save BEGIN: ['save', ['id',
> '1 '], ['state', 'begin'], ['domain', '1'], ['file', '/usr/save']]
> [2005-03-02 00:14:11 xend] INFO (XendRoot:91) EVENT> xend.domain.save
> ['athena',
>  '1', 'begin', ['save', ['id', '1'], ['state', 'begin'], ['domain', '1'],
>  ['file
> ', '/usr/save']]]
> [2005-03-02 00:14:11 xend] INFO (XendMigrate:390) Save ERROR: ['save', ['id',
> '1 '], ['state', 'error'], ['domain', '1'], ['file', '/usr/save']]
> [2005-03-02 00:14:11 xend] INFO (XendRoot:91) EVENT> xend.domain.save
> ['athena',
>  '1', 'error', ['save', ['id', '1'], ['state', 'error'], ['domain', '1'],
>  ['file
> ', '/usr/save']]]
> 
> xend-debug.log this one:
> 
> sync_session> <type 'str'> 1 ['save', ['id', '1'], ['state', 'begin'],
> ['domain' , '1'], ['file', '/usr/save']]
> Started to connect self= <xen.xend.XendMigrate.XfrdClientFactory instance at
> 0xb 78e1f4c> connector= <twisted.internet.tcp.Connector instance at
> 0xb78e1d8c> buildProtocol> IPv4Address(TCP, 'localhost', 8002)
> 
> 
> 2) A simple domain with 2 vif will failed to save (even if there is only one
> vbd)
> 
> 3)A simple domain (1vif+2vbd) failed to save when you export a device to it 
> This is the case of my firewall which has the extrernal network card hided
> from Dom0 and showed in a DomU.
> When i issue the xm save command the action is pretty long ~ 1 minute and
> after i get this message:
> zeus:/var/log# xm save cerbere /usr/cerbere
> Error: Error: [Failure instance: Traceback:
> twisted.internet.defer.TimeoutError, Callback timed out
> 
> xfrd contains this message:
>  
> [DEBUG] Conn_sxpr>
> (xfr.save 2 "(domain (id 2) (name cerbere) (memory 31) (maxmem 32768) (state
> -b- --) (cpu 0) (cpu_time 108.68242009) (up_time 89498.2455249) (start_time
> 11096297 66.13) (console (status listening) (id 16) (domain 2) (local_port 16)
> (remote_po rt 1) (console_port 9602)) (devices (vif (idx 0) (vif 0) (mac
> aa:00:00:00:00:10)
>  (bridge xen-br0) (evtchn 18 5) (index 0)) (vbd (idx 0) (vdev 833) (device
>  65026
> ) (mode w) (dev hdb1) (uname phy:zeus_lvs/cerbere_root) (node
> zeus_lvs/cerbere_r oot) (index 0)) (vbd (idx 1) (vdev 834) (device 65027)
> (mode w) (dev hdb2) (unam e phy:zeus_lvs/cerbere_var) (node
> zeus_lvs/cerbere_var) (index 1))) (config (vm (name cerbere) (id 3) (memory
> 32) (image (linux (kernel /boot/vmlinuz-2.6.10-xen 0) (root '/dev/hdb1 ro')
> (ip off))) (device (pci (bus 0x00) (dev 0x0B) (func 0x0 ))) (device (vbd
> (uname phy:zeus_lvs/cerbere_root) (dev hdb1) (mode w))) (device
>  (vbd (uname phy:zeus_lvs/cerbere_var) (dev hdb2) (mode w))) (device (vif (mac
>  A
> A:00:00:00:00:10) (bridge xen-br0))) (restart onreboot))))"
> /usr/cerbere)[DEBUG]
>  Conn_sxpr< err=0
> [1109719264.449167] xc_linux_save start 2
> 
> xc_linux_save start 2
> [DEBUG] Conn_sxpr>
> (xfr.err 22)[DEBUG] Conn_sxpr< err=0
> Retry suspend domain (10005) <-- this line is repeated  a large number of
> times ...
> Retry suspend domain (10005)
> Retry suspend domain (10005)
> Unable to suspend domain. (10005)
> Unable to suspend domain. (10005)
> Domain appears not to have suspended: 10005
> Domain appears not to have suspended: 10005
> 2662 [INF] XFRD> Xfr service err=0
> 
> the xend-debug contains thoses lines:
> sync_session> <type 'str'> 2 ['save', ['id', '2'], ['state', 'begin'],
> ['domain' , '2'], ['file', '/usr/cerbere']]
> Started to connect self= <xen.xend.XendMigrate.XfrdClientFactory instance at
> 0xb 78e126c> connector= <twisted.internet.tcp.Connector instance at
> 0xb78e1fac> buildProtocol> IPv4Address(TCP, 'localhost', 8002)
> ***request> (domain (id 2) (name cerbere) (memory 31) (maxmem 32768) (state
> -b-- -) (cpu 0) (cpu_time 108.68242009) (up_time 89498.233706) (start_time
> 1109629766 .13) (console (status listening) (id 16) (domain 2) (local_port 16)
> (remote_port
>  1) (console_port 9602)) (devices (vif (idx 0) (vif 0) (mac aa:00:00:00:00:10)
>  (
> bridge xen-br0) (evtchn 18 5) (index 0)) (vbd (idx 0) (vdev 833) (device
> 65026) (mode w) (dev hdb1) (uname phy:zeus_lvs/cerbere_root) (node
> zeus_lvs/cerbere_roo t) (index 0)) (vbd (idx 1) (vdev 834) (device 65027)
> (mode w) (dev hdb2) (uname phy:zeus_lvs/cerbere_var) (node
> zeus_lvs/cerbere_var) (index 1))) (config (vm (n ame cerbere) (id 3) (memory
> 32) (image (linux (kernel /boot/vmlinuz-2.6.10-xen0)
>  (root '/dev/hdb1 ro') (ip off))) (device (pci (bus 0x00) (dev 0x0B) (func
>  0x0))
> ) (device (vbd (uname phy:zeus_lvs/cerbere_root) (dev hdb1) (mode w))) (device
> ( vbd (uname phy:zeus_lvs/cerbere_var) (dev hdb2) (mode w))) (device (vif (mac
> AA: 00:00:00:00:10) (bridge xen-br0))) (restart onreboot))))
> ***request> begin
> xfr_err> ['xfr.err', '0']
> xfr_err> <type 'str'> 0
> xfr_vm_suspend> ['xfr.vm.suspend', '2']
> {}
> VirqClient.virqReceived> 4
> vif-bridge down vif=vif2.0 domain=cerbere mac=aa:00:00:00:00:10 bridge=xen-br0
> xfr_vm_suspend>cberr> [Failure instance: Traceback:
> twisted.internet.defer.Timeo utError, Callback timed out
> ]
> Error> [Failure instance: Traceback: twisted.internet.defer.TimeoutError,
> Callba ck timed out
> ]
> Error> calling errback
> ***cbremove> [Failure instance: Traceback:
> twisted.internet.defer.TimeoutError, Callback timed out
> ]
> ***_delete_session> 2
> xfr_err> ['xfr.err', '1']
> xfr_err> <type 'str'> 1
> Error> 1
> Xfrd>loseConnection>
> Xfrd>connectionLost> [Failure instance: Traceback:
> twisted.internet.error.Connec tionDone, Connection was closed cleanly.
> ]
> XfrdSaveInfo>connectionLost> [Failure instance: Traceback:
> twisted.internet.erro r.ConnectionDone, Connection was closed cleanly.
> 
> After this the domain does not exist anymore and the save file is empty.
> 
> i'm hoping for your help ...
> Matthieu
> 
> 
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> 


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